Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 696 · 40 questions

The method (Start value is 100%): New value after a rise of p%: value + p% of value. After a fall: value − p% of value. Percent change = change ÷ starting value × 100. Two changes a% and b% one after the other: a + b + (a × b) ÷ 100, with a fall counted as minus.

1. 1.A town has 3720 people. Its population grows by 30%. How many people live there now?
2. 2.The price of a bicycle is ₹4040. It goes up by 40%. What is the new price (in ₹)?
3. 3.The price of a school bag changes from ₹2680 to ₹2412. By what percent did it come down?
4. 4.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
5. 5.A water tank holds 4620 litres. 25% of the water is used. How many litres are left?
6. 6.A water tank holds 3880 litres. 10% of the water is used. How many litres are left?
7. 7.The price of a bicycle is ₹3280. It goes up by 5%. What is the new price (in ₹)?
8. 8.A town has 1260 people. Its population grows by 15%. How many people live there now?
9. 9.A water tank holds 1420 litres. 5% of the water is used. How many litres are left?
10. 10.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
11. 11.A town has 1460 people. Its population grows by 20%. How many people live there now?
12. 12.The price of a bicycle is ₹640. It goes up by 15%. What is the new price (in ₹)?
13. 13.The price of a bicycle is ₹1420. It goes up by 25%. What is the new price (in ₹)?
14. 14.A town has 700 people. Its population grows by 10%. How many people live there now?
15. 15.The price of a bicycle is ₹920. It goes up by 50%. What is the new price (in ₹)?
16. 16.The price of a school bag changes from ₹1320 to ₹924. By what percent did it come down?
17. 17.A water tank holds 2880 litres. 50% of the water is used. How many litres are left?
18. 18.A water tank holds 4340 litres. 15% of the water is used. How many litres are left?
19. 19.A water tank holds 2160 litres. 5% of the water is used. How many litres are left?
20. 20.The price of a school bag changes from ₹1140 to ₹1596. By what percent did it go up?
21. 21.The price of a school bag changes from ₹2920 to ₹2774. By what percent did it come down?
22. 22.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
23. 23.A shop sells 3500 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
24. 24.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
25. 25.A shop sells 2220 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
26. 26.A water tank holds 1640 litres. 25% of the water is used. How many litres are left?
27. 27.The price of a school bag changes from ₹1460 to ₹1898. By what percent did it go up?
28. 28.The price of a school bag changes from ₹1040 to ₹1560. By what percent did it go up?
29. 29.The price of a school bag changes from ₹3340 to ₹1670. By what percent did it come down?
30. 30.A water tank holds 760 litres. 25% of the water is used. How many litres are left?
31. 31.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
32. 32.A water tank holds 1660 litres. 15% of the water is used. How many litres are left?
33. 33.A shop sells 2600 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
34. 34.The price of a bicycle is ₹2880. It goes up by 10%. What is the new price (in ₹)?
35. 35.A town has 1660 people. Its population grows by 15%. How many people live there now?
36. 36.The price of a school bag changes from ₹2980 to ₹3129. By what percent did it go up?
37. 37.A town has 3340 people. Its population grows by 15%. How many people live there now?
38. 38.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
39. 39.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
40. 40.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =

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